Art By Igor Amelkovich

An art form is the specific shape, or quality an artistic expression takes. The media used often influence the form. For example, the form of a sculpture must exist in space in three dimensions, and respond to gravity. The constraints and limitations of a particular medium are thus called its formal qualities. To give another example, the formal qualities of painting are the canvas texture, color, and brush texture. The formal qualities of video games are non-linearity, interactivity and virtual presence. The form of a particular work of art is determined by both the formal qualities of the media, and the intentions of the artist.
A genre is a set of conventions and styles within a particular medium. For instance, well recognized genres in film are western, horror and romantic comedy. Genres in music include death metal and trip hop. Genres in painting include still life and pastoral landscape. A particular work of art may bend or combine genres but each genre has a recognizable group of conventions, clichés and tropes. (One note: the word genre has a second older meaning within painting; genre painting was a phrase used in the 17th to 19th centuries to refer specifically to paintings of scenes of everyday life and can still be used in this way.)
The style of an artwork, artist, or movement is the distinctive method and form followed by the respective art. Any loose brushy, dripped or poured abstract painting is called expressionistic. Often a style is linked with a particular historical period, set of ideas, and particular artistic movement. So Jackson Pollock is called an Abstract Expressionist.
Because a particular style may have specific cultural meanings, it is important to be sensitive to differences in technique. Roy Lichtenstein's (1923–1997) paintings are not pointillist, despite his uses of dots, because they are not aligned with the original proponents of Pointillism. Lichtenstein used Ben-Day dots: they are evenly spaced and create flat areas of color. Dots of this type, used in halftone printing, were originally used in comic strips and newspapers to reproduce color. Lichtenstein thus uses the dots as a style to question the "high" art of painting with the "low" art of comics - to comment on class distinctions in culture. Lichtenstein is thus associated with the American Pop art movement (1960s). Pointillism is a technique in late Impressionism (1880s), developed especially by the artist Georges Seurat, that employs dots that are spaced in a way to create variation in color and depth in an attempt to paint images that were closer to the way people really see color. Both artists use dots, but the particular style and technique relate to the artistic movement adopted by each artist.